White Rogers Universal Two-stage HSI Integrated Igniter and Module Furnace Control Kit

White Rogers Universal Two-stage HSI Integrated Igniter and Module Furnace Control Kit 21M51U-843

Includes:
• Module
• Ignitor Kit

FEATURES
• 120 VAC 3-speed PSC (Permanent Split Capacitor) circulator output, two-speed
inducer output, 2-stage gas valve output.
• Pushbutton fault history retrieval.
• Furnace status LED – tri-color (green, red and amber).
• Heat fan off delay (dipswitch selectable), fan on delay for cooling.
• Auto second stage delay (dipswitch selectable).
• 120 VAC humidifier output/120 VAC electronic air cleaner output.

21M51U-843 Cross Reference Application Data


Lennox 18M3401, 46M9901, 50M61-120, 83L9301, - Must Use 21D64-2*
Goodman 20300001 20300003 - Must Use 21D64-2*
Coleman / Evcon / Luxaire / York 50M51-242 Use existing or 21D64-2
Amana/Goodman 50M61-288, 50M61-289 - Must Use 21D64-2*
American Standard/Trane 50M61-495 - Must Use 21D64-2*
White-Rodgers Standard 50M61-843 - Must Use 21D64-2*
Trane CNT03077, X13650839010

Note: The Installer may have to modify existing ignitor hole to accommodate the new 21D64-2, with ceramic
diameter (.394”).

*21D64-2 Ignitor Note: In these applications, the existing 80V igniter must be replaced by the 120V 21D64-2
ignitor.

We are a Factory Authorized Parts Distributor. We stock replacement HVAC furnace parts used by the professionals. Give us a call for all your HVAC furnace parts and accessories needs. Toll Free: 1-877-733-9241

The 21M51U-843 White Rogers Universal Two-stage HSI Integrated Igniter and Module Furnace Control Kit is a stocked item and ready to be shipped to you today.

Replaces: 50M61-843